interface AdvancedMediaPlayer {
    public void playVlc(String fileName);
    public void playMp4(String fileName);
}

class VlcPlayer implements AdvancedMediaPlayer {
    @Override
    public void playVlc(String fileName) {
        System.out.println("Playing vlc file. Name: "+ fileName);
    }
    @Override
    public void playMp4(String fileName) {}
}
class Mp4Player implements AdvancedMediaPlayer {
    @Override
    public void playVlc(String fileName) {}
    @Override
    public void playMp4(String fileName) {
        System.out.println("Playing mp4 file. Name: "+ fileName);
    }
}

interface MediaPlayer {
    public void play(String audioType, String fileName);
}

class MediaAdapter implements MediaPlayer {
    AdvancedMediaPlayer advancedMusicPlayer;

    public MediaAdapter(String audioType) {
        if ( audioType.equalsIgnoreCase("vlc") ) {
            advancedMusicPlayer = new VlcPlayer();
        } else if ( audioType.equalsIgnoreCase("mp4") ) {
            advancedMusicPlayer = new Mp4Player();
        }
    }

    @Override
    public void play(String audioType, String fileName) {
        if ( audioType.equalsIgnoreCase("vlc") ) {
            advancedMusicPlayer.playVlc(fileName);
        } else if ( audioType.equalsIgnoreCase("mp4") ) {
            advancedMusicPlayer.playMp4(fileName);
        }
    }
}
class AudioPlayer implements MediaPlayer {
    MediaAdapter mediaAdapter;

    @Override
    public void play(String audioType, String fileName) {
        if ( audioType.equalsIgnoreCase("mp3") ) {
            System.out.println("Playing mp3 file. Name: "+ fileName);
        } else if ( audioType.equalsIgnoreCase("vlc") || audioType.equalsIgnoreCase("mp4") ) {
            mediaAdapter = new MediaAdapter(audioType);
            mediaAdapter.play(audioType, fileName);
        } else {
            System.out.println("Invalid media. " + audioType + " format not supported");
        }
    }
}

public class AdapterDemo {
    public static void main(String[] args) {
        AudioPlayer audioPlayer = new AudioPlayer();

        audioPlayer.play("mp3", "beyond the horizon.mp3");
        audioPlayer.play("mp4", "alone.mp4");
        audioPlayer.play("vlc", "far far away.vlc");
        audioPlayer.play("avi", "mind me.avi");
    }
}
